False Teachers' Perspective

"They [the false teachers] fared like a man who looks through a colored glass. Put before such a man whatever color you please, he sees no other color than that of the glass. The fault is not that the right color is not put before him but that his glass is colored differently, as the word of Isaiah 6:9 puts it: You will see, he says, and yet you will not see it."
What Luther Says, An Anthology, 3 vols.,
ed., Ewald Plass, St. Louis: Concordia Publishing House, 1959, II, p. 644. Isaiah 6:9.